Stroboscope
por mread
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Descripción
Stroboscope.
This was made to check the fan speeds on a new computer build.
Four leds from
http://www.amazon.co.uk/gp/product/B008AGOLQA?psc=1&redirect=true&ref_=oh_aui_detailpage_o02_s00
are driven via a BC639 npn transistor from the arduino Microview.